Lay-actuated wept detector



Aug. 23, 1927.

1,639,823 W. H. WAKEFIELD YARN IMPINGING LAY ACTUATED WEFT DETECTOR CONTROLLED BY Box MOTION Filedie 1924 2 sheets-sheet 1 I \2 :4 4s I? W Mwmpw Aug; 23, 1927;

1,639,823 w. H. WAKEFIELD YARN INPINGING LAY ACTUA'ILED WEFT DETECTOR CONTROLLED BY BQX MOTION Filed Dec. 30, 192A 2 Sheets-Sheet 2 l wxwmm Patented Aug. 23, 1927.

WALTER H. wAKEFIELn'or woncnsrnia,

& KNOWLES LOOM wonKs, MASSACHUSETTS.

YARN-IMPINGI NG LA -AoTuA'rEn wnr'r Application filed December This invention relates to improvements in.

ber variably sensitive depending upon which shuttle is active.

It is a further object of my invention to provide a detector of this type wherein all oi the detector parts proper retain their same adjustment and wherein the variable portion of the mechanism is carried by-the lay.

which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter.

described and set forth in the claims.

In the accompanying drawings wherein I have shown one embodiment of my invention, V

Fig. 1 is a front elevation of a portion of a loom having my invention applied thereto and showing the same as provided with shuttl'e'boxes to accommodate two shuttles,

Fig. 2 is a top plan view of the detector, certain parts being in section,

Fig. 3 is a vertical section on line 3-3 oi Fig. 2,

Fig. 4 is a vertical section on line 44 of Fig.3 and showing the method of mountinn" the slide on the lay which renders the detector variably sensitive, and q Fig. 5 is an enlarged section on line 5-5 olFigl.

Referring to the drawings it will be seen that I have provided a loom Frame 10 and a lay'll on which is mounted tor vertical motion a plurality of shuttle boxes12 which may beactuated in any approved manner by mechanism not shown forming no part of the present invention. Said shuttle boxes have a frame 13 on which is mounted'a plurality othinders 14, said binders-terminating a suflicient distance from the inner end of the frame 13 "tojpermit the latter to have secured thereto a block 15 having formedtherewith a groovel6.

With these and other objects in view 1,639,823 UNITED srarss PATENT OFFICE.

MA'ssAcIrusnrTs, nssrsuon To onomr'rou 0F wo'nonsrnn, mnssacrrusnrrsn CORPORATION on nnrno'ron CONTROLLED BY BOX MOTION.

so, 1924. Serial 110758305.

tions depending upon the posit-ion of the oliset in SHl ilQ'Z'OOVG. As shown herein said groove or slot is provided with an offset corresponding to the second shuttle box which shown in active position. The

lower end of said lever 21 is adjustably con nectedby means of link 23to a second lever 24 located onthe opposite side of the loom andpivotallv mounted on a stud 25 which extends from a stand 26 de fiending from the lay 11. The upper end of the lever 24: is

slotted as at 27 and has driving connection.

with a slide block 28 by means of a c0nnesting stud 29 shown inFig. 1. Theblock 28 is slidably mounted in a guide 30 having a foot 31 extendingunder and secured to the box plate 32 and afiording means'where-v by said guide maybe supported to the box frame. A cap retains the block in the guide.

The block 28 is provided with actuating surfaces. oi difierent heights, the form of block shown herein having a low surface 34.

and two high surfaces 35 which are in effect the frontface of said block.

which shuttle is active, the offset 36 in the slotlfi and the low surface 34 in the slide block 28 corresponding to a shuttle having fine yarn. i

The detector is located on the opposite side ot' the loom from the boxes 12 andcomprises a stand 4'0"secured in any approved n'ianner to the loom tramelO and havingupstanding therefrom a horn 41 through which pro iects a controller pin 42 normally lying across a slot 43 in, said horn to be under the path of a regularly reciprocated actuating lever 44%. When suflicient yarn'for continued weaving isfpresent, said controller, which is normally under the lever 44, will be withdrawn sufiiciently to allow'said lever .44 to descend without being; interrupted, but when an indication otweft exhaustion is to begiveirthe controller pin 42 will remain As the shuttleboxes 12 are raised and lowered the lever 21 under said lever and cause the opposite endthereof (not shown)- to descend to give an. indication to the weft replenishing mechanism. This portion of the mechanism is old and may be the same asshown. in Patent No. 1,030,748 to which reference may be had for further description and illustration of the same.

The controller 42 is pivotally connected to the upper end of an arm 45 the lower end of which is secured in adjusted position to ashaft 46 which turns freely in a pair of bearings 47 and 48, respectively, extending forwardly from the frame 40. A second arm 46 is secured in angularly adjusted position to'said shaft 46 and is normally held rearwardly by a torsion spring 50 one end of which is connected toacoll'ar' 51 secured I to the shaft 46 and the other end of which is received by bearing 48. The spring also-serves to hold the controller 42 under the actuator lever 44.

feeler bed 52' is mounted on a threaded sleeve supported bythe frame 40 and has slida-bly mounted therein a detector slide 54; A'clip 55 secured to the slide. 54 extends upwardly therefrom and has extending therethrough a stud 56 the rear end of which is enlarged and threaded as at 57 to serve as a stop for said clip and slide, a

spring 58 surrounding said stud 56 and pressing against the forward end of a cap 59to hold said slide normally in rear position. That portion of the detector so far 1 described may be the same as that set forth in Patent No. 97 2,7 22.

In carrying my invention into effect I provide a yarn impinging detecting element 60 pivoted as at6l to the slide 54 and having the rear: portion thereof provided with teeth 62 which are so proportioned as to be I embedded in the yarn" when a bobbin supplied with sufiicient yarn is presented thereto. Y A rod 63'' has' an enlarged forward end 64 to receive a stop screw 65 the rear end of which is positioned to engage the bed 52.

The rear end of said rod- 63 1s hook shaped as at 66 to extend aroun'dthe laterally projecting arm 67 of the yarn impinging detector 60. Said rod 66 has a bearing block 68 mowed thereto through which extends the rear end of a: push rod 69, and the forward end of said push rod passes through a block 70 rigidly secured to the slide 54 and engages lever 49.

In operation when there is a sufficientsupply of working weft for continued weaving the teeth 62 of the detector 6O will be embedded in the yarn so that as the same moves forwardly it will be held against angularmotion under influence of spring 50. When the working layer of yarn becomes depleted to such a thickness as to make an indication of exhaustion desirable a screw 71 which is adjustably held in a boss 7 2 dewhich the block 28' strikes the screw 71. As

shown in: the" drawings the detector is positloned for fine yarn, the relatively low surface-34 engaging the screw 71 at a comparatively la'te time in the forward beat of the lay permitting the teeth 62 to be nearer the center of the bobbin when the detector 60 starts to move rearwardly. hen theboxes change so that course yarn is woven theblock 28 will be moved longitudinally to bring'one of the relatively high surfaces 35 opposite the screw 71 which condition meansthat the detector 60 willstart to move with the bobbin when the same is farther from the teeth 62 than was the case when the fineyarn was being woven. In this way the detector operates in timed relation with the active shuttle to give an amount of waste which is permissiblefor both sizcs of yarn.

The screw or stud: 71 is provided with a broad head 73 which engages the slide 28, the head having beveled, edges to assist in passing from one to the other of the snrfaces. 34 and 35;

From the foregoing it will be seen that I have provided a feeler having a yarn impinging surface and actuated by the lay so constructed as to more sensitive when detecting fine yarn than when detect ng coarseyarn. It will be further noted that the mechanism which effects this change is mounted on the lay and the detector parts retain the same relative position so that they may retain the same setting for all degrees of sensitiweness. Also, theslide and its controlling mechanism are located entirely on the lay, the force to move the slide being derived directly from the boxes and conveyed positively to said slide.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a loom having a plurality of shuttle boxes each of which is movable to active position, a lay, shuttles for the boxes having a Weft supply to be detected, a detector having a yarn impinging member and a lay actuated member,'and means under control of the shuttle boxes and dependent upon which members movable with the detector, and

means operating in timed relation with the shuttle boxes and dependent upon which box is in active position to determine the time of actuation of said lay actuated member.

3. In a loom having a plurality of shuttle boxes each of which is movable to active position, a lay, shuttles for the boxes having a weft supply to be detected, a yarn impinging detector, a lay actuated member operatively associated therewith, and means under control of the shuttle boxes and dependent upon which box is in active position to vary the time of actuation of said member on the forward beat of the lay.

4C. In a loom having a plurality ofshuttle boxes any one of which may become active, a weft detector having a yarn impinging member and a lay engaged member, and means under control of the active shuttle box to vary the distance intervening between the yarn engaging surface of the yarn impinging member and the surface of the lay engaged member which is engaged by the lay.

5. In a loom having a plurality of shifting shuttle boxes any one of which may become active, a lay, a yarn impinging detector, an actuator operatively connected to the detector, and a member on the lay movable under control of the active shuttle box Q and positioned to engage the actuator at active, a yarn impinging detector, means to render said'detector effective to give an indication of substantial weft exhaustion when the distance between said detector and the bobbin reaches a predetermined amount, and means under control of the active shuttle box to vary the predetermined amount of distance between said detector and the bobbin necessary to render said detector operative to indicate weft exhaustion.

7. In a loom having a plurality of shifting shuttle boxes each of which may become active, a yarn impinging detector, a lay, means to render said detector effective to give an indication of substantial weft exhaustion when the distance between said detector and the bobbin reaches a predetermined amount, and means under control of the active shuttle box to vary the predetermined amount of distance between said detector and the bobbin necessary to render said detector operative to indicate weft exhaustion, said means including a member engaging a part of the lay.

8. In a loom having a plurality of shifting shuttle boxes each of which may become active, a weft detector having a yarn contacting element and a lay engaged actuator, mechanism to indicate weft exhaustion, said mechanism remaining inoperative so long as the yarn contacting element engages the yarn before the lay engages the actuator and becoming operative when the lay engages the actuator before the contacting element engages the yarn, and means under control of the active shuttle box and dependent upon which shuttle box is active to vary the time of engagement of the actuator by the lay as the latter moves toward the detector.

In testimony whereof I have hereunto affixed my signature.

WALTER H. WAKEFIELD. 

